package main

import "fmt"

const (
	i = 1 << iota
	j = 3 << iota
	k
	l
)

func main() {
	fmt.Println(i, j, k, l) //1 6 12 24
}

//1左移0位  1->1
//3左移1位  11 ->110
//k等于j  等于 3>>2 11 -> 1100
//l等于k  等于 3>>3 11 -> 11000
